Enable Google Cloud Storage
Cloudflare uses Google Cloud Identity and Access Management (IAM) to gain access to your bucket. The Cloudflare IAM service account needs admin permission for the bucket.
To enable Logpush to GCS:
Create a GCS bucket. See instructions from GCS.
In Storage > Browser > Bucket > Permissions, add the member
logpush@cloudflare-data.iam.gserviceaccount.com
with Storage Object Admin permission.